Gas stoves were already developing a reputation as a climate villain. Then a came a report linking their use to childhood asthma and a US regulator’s comment that they might be banned, and they were suddenly a part of the country’s left-right culture wars. Dozens of cities including New York and Los Angeles have approved rules banning or discouraging new gas hookups for appliances, and the US Consumer Product Safety Commission is examining emissions from appliances including stoves. Many US cons